📦 Make git archives immutable

Refs:
* https://setuptools-scm.readthedocs.io/en/latest/usage/#git-archives
* pypa/setuptools-scm#806

Author: webknjaz

.git_archival.txt

@@ -1,4 +1,3 @@
 node: $Format:%H$
 node-date: $Format:%cI$
-describe-name: $Format:%(describe:tags=true,match=*[0-9]*)$
-ref-names: $Format:%D$
+describe-name: $Format:%(describe:tags=true,match=v[0-9]*)$